Compilare: user.cpp: In function ‘int minim(int, int)’: user.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=s[a].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[i].size()==lgmax) ^ user.cpp:32:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lgmax<s[i].size()) ^ user.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l=0;l<s[j].size();l++) ^ user.cpp:54:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lg==s[i].size()) ^ user.cpp:67:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ^ user.cpp: In function ‘int minim(int, int)’: user.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^